Lighting design] [Jiangxi, professional landscape lighting design, landscape lighting design in architectural industry qualification provided by China lighting industry. Jiangxi Province in the industry landscape project to install Ltd. (www.jxzhongye.com.cn) have passed the entire network, "Business League certification", please rest assured purchase, click on the page check "Business League certification icon," the company authentication information. You can also click on the "Business League Service Icons" on this page directly contact our customer service! Jiangxi Province in the industry landscape lighting design engineering installation works budget Ltd., founded in 1994. 20 years of professional landscape lighting design, the industry adhering to the "Albert Hing China lighting design, a human light" corporate mission, to create the industry's well-known "in the industry" brand. In today has grown into a company with many years in the landscape lighting project design, budgeting, construction site management, installation, LED electronic products R & D, manufacturing and sales of high-tech enterprises. Companies with urban and road lighting engineering contractor qualification, special lighting engineering design B qualification, intelligent building three qualifications. Television film and television lighting lighting lighting roughly divided into film and television lighting, which is characterized by multi-objective emphasizes the reduction of natural light effects, light effects and more to pursue the truth, rationality, consider the coordination of multi-source video equipment and lighting when . 1 movie lighting movie lighting and indoor lighting is divided into exterior lighting. Exterior lighting in general to respect the laws of natural light, try to reproduce natural light or moderate the effect; interior lighting is required to fully consider the characteristics of the photosensitive material, a film based on the use of different types and sensitivity illuminance and color temperature moderate lighting. The choice of traditional lighting fixtures to the main road lighting design network, but the power is relatively large, high color temperature. Also note that the tolerance of the photosensitive material, and strictly control the light ratio. 2 TV shows TV shows lighting lighting is mainly divided into film stills that TV news studio lighting and exterior lighting and so on. Jiangxi Province in the industry landscape project to install Ltd., founded in 1994. For 20 years, the industry, adhering to the "Albert Hing China, a human light" corporate mission, to create the industry's well-known "in the industry" brand. In today has grown into a company with many years in the landscape lighting project design, budgeting, construction site management, installation, LED electronic products R & D, manufacturing and sales of high-tech enterprises. Companies with urban and road lighting engineering contractor qualification, special lighting engineering design B qualification, intelligent building three qualifications. Design basis LED 1, LED drive power LED according to the characteristics of the design elements, which is safe to use the constant current drive type, the constant current driver circuit is characterized by: a constant current output, and outputs it as the DC voltage load resistance changes of different sizes within a certain range, the resistance load is small, the output voltage is low, the greater the load resistance, the output voltage is higher. Attentive readers may find on the market as the main components of the LED products, they use a simple capacitor step-down mode, constant current through a capacitor to achieve the role of these products has a fatal flaw, it is often in the switching power supply instantly, once burned down the LED device, the reason that the charging and discharging characteristics of the capacitor caused by the differential circuit where the capacitance of the capacitor is, the arc tube internal resistance to the time parameter t is equivalent to the differential resistance of the circuit, differential circuit = 0.7RC, the charge and discharge at the moment t, the instantaneous current flowing through the LED's great (the number may reach ten times the normal current of even hundreds of times), resulting in permanent damage to the chip instantly. A higher reliability of the LED drive circuit shown in Figure 1 (compare Used LED series applications): This circuit, C 1 can be omitted, another inexpensive U1 can use diodes instead of the common drawback of this circuit is its low efficiency , when the tens (65 or less) than the arc tube connected in series, the higher the efficiency. The circuit can also be simplified, cancel U1 and C1, Q1 base can be directly connected to the lower end of R1, steady flow of 0.6/R1 decisions taken when R1 30 ohms, a constant current of 20mA.